【作者】 程功；

【导师】 杨志永； 朱春来；

【作者基本信息】 天津大学 ， 机械工程， 2012， 硕士

【摘要】 本课题结合某军工横向课题，及水下密闭室的特殊情况和空气过滤器试验台的功能需求，研究并开发了通风试验防护系统。取得如下成果：首先，本文提出了一种新型水下密闭室通风试验系统的整体设计方案。该系统具有占地面积小、控制精度高以及运行稳定等优点。方案主要分为管道系统设计方案和控制系统设计方案。其次，建立管道系统的三维模型，进行了基于ANSYS Fluent软件的流体力学仿真，获得管道系统流体的矢量图、静动压云图、流线图、点图等仿真结果。基于此，修正了系统三维模型，确定了管道系统中关键零部件的最佳安装位置以及管道最优布局图。第三，建立了以计算机为上位机、PLC为下位机的自动控制系统，包括过程控制和恒流量控制。过程控制以阀门与风机的顺序启闭和系统运行参数的反馈为基础，实现系统运行状态的自动监控。恒流量控制为变频器和调节阀协同控制，当系统设定流量值偏低时，单独采用变频器调节流量，当设定值偏高时，单独采用调节阀调节流量。最后，采用西门子PLC编程软件STEP7MicroWIN，触摸屏组态软件SIMATIC WinCC flexible设计了通风试验系统人机界面。搭建通风试验系统的试验平台，对控制系统进行了测试，结果表明，系统可以稳定运行，各种功能均能稳定实现。本课题完成了对通风试验防护系统的研发，其成果对于舰船密闭室通风过滤防护技术的研究与应用奠定了较高的基础。.更多还原

【Abstract】 According to the special circumstances of the underwater closed cabin and thefunctional requirements of air filter test rig, the ventilation test system based onSiemens PLC controller has been presented. The article mainly include the followingworks:Firstly, a novel design scheme which has small occupation of land and highprecision flow control has been proposed. The design of the scheme is divided intopipeline system design and control system design.Secondly, establish3-D model of the pipeline system; derive the hydrauliccalculation formulas of the gas pipeline and conduct the simulation using the ANSYSFluent software. Based on model simulations, the static and dynamic pressure cloudpictures, the flow charts and the plots of the pipeline system have been acquired.Due to the analysis results of the above factors, the3-D model has been modified.Furthermore, the installation location of the key components in the pipeline systemand the pipeline construction drawings has been determined.Thirdly, by studying the control requirements, the automatic control system ofcomputer for the upper computer and PLC for the lower computer has beendetermined. The system mainly includes process control and constant flow control.Constant flow control algorithm uses PID control algorithm, the control mode is thecollaborative control using inverter and control valve. When the real-time flow valueis lower than the set flow value, the system only uses the inverter. Otherwise thesystem only uses the control valve.Finally, Using Siemens PLC programming software STEP7MicroWIN and thetouch screen configuration software SIMATIC WinCC flexible design man-machineinterface of the ventilation test system. The test platform of protection test system hasbeen built. The control system has been tested, the results show that the system can bestable operation and various functions can normally achieve.更多还原